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STEM奇妙科学课 Season 1 Episode 8 音调的秘密 2019

蜻蜓的翅膀比蜜蜂的更宽大,所以飞行时振动得慢,发出的声音会比较低沉!我们可以通过调节物体振动的快慢来让声音变得高低不同,一起来用杯子做一个琴玩吧!

  • 发布日期: 2019-10-29
  •   运行时间 : 60 分钟
  •   类型 : 动画, 儿童
  •   明星 :
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